value	quality	siderealorsynodic	author	ref	method
8.5315	2	Synodic	Pal	2020ApJS..247...26P	Lightcurve
8.5331	2	Sidereal	Durech	2019A&A...631A...2D	Model
8.5331	2	Sidereal	Durech	2023A&A...675A..24D	Model